Deferred_result (one_or_two.One_or_two.Deferred

val sequence : 
  [ `One of ( 'a, 'e ) Core_kernel.Result.t Async_kernel.Deferred.t
  | `Two of
    ( 'a, 'e ) Core_kernel.Result.t Async_kernel.Deferred.t
    * ( 'a, 'e ) Core_kernel.Result.t Async_kernel.Deferred.t ] ->
  ( [ `One of 'a | `Two of 'a * 'a ], 'e ) Core_kernel.Result.t
    Async_kernel.Deferred.t

val map : 
  [ `One of 'a | `Two of 'a * 'a ] ->
  f:( 'a -> ( 'b, 'e ) Core_kernel.Result.t Async_kernel.Deferred.t ) ->
  ( [ `One of 'b | `Two of 'b * 'b ], 'e ) Core_kernel.Result.t
    Async_kernel.Deferred.t

val fold : 
  [ `One of 'a | `Two of 'a * 'a ] ->
  init:'accum ->
  f:
    ( 'accum ->
      'a ->
      ( 'accum, 'e ) Core_kernel.Result.t Async_kernel.Deferred.t ) ->
  ( 'accum, 'e ) Core_kernel.Result.t Async_kernel.Deferred.t